NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 505
QWEST CORPORATION 184
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 98
NEW CINGULAR WIRELESS PCS, LLC 77
T-MOBILE USA, INC. 65
ONVOY, LLC - NM 54
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 505-271 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-272 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-275 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-277 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-280 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-281 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-282 none assigned yet which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-284 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-285 0XXX1XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 GRANTS NM
— 505-286 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-287 0XXX1XXX · 2 holders which blocks → QWEST CORPORATION 9636 GRANTS NM
— 505-288 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-290 3XXX4XXX5XXX6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 GRANTS NM
— 505-291 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-292 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-293 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-294 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-296 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-298 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-299 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-301 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
— 505-310 6XXX which blocks → T-MOBILE USA, INC. 6529 SANTA FE NM
— 505-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NM
— 505-314 3XXX4XXX6XXX which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-315 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
— 505-316 7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA FE NM
— 505-319 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
— 505-320 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
— 505-321 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-323 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-324 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-325 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-326 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-327 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-328 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-330 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
— 505-331 6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-332 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-333 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9636 AZTEC NM
— 505-334 not yet reported which blocks → QWEST CORPORATION 9636 AZTEC NM
— 505-335 not yet reported which blocks → NM
— 505-338 not yet reported which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-341 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-342 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-343 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-344 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-345 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-346 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 7464 ALBUQURQUE NM
— 505-348 6XXX7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 7464 ALBUQURQUE NM
— 505-349 0XXX1XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → AT&T - LOCAL 7421 ALBUQURQUE NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.